The Enteric Nervous SystemCopyrightMcGraw-Hill Education. Permission required for reproduction or display.Specialized cellscalled pacemakersgenerate rhythmiccontractions bystimulating smoothStructuresFunctionsProductionInterstitialcells ofof slow wavesenterCajalConduction ofslow waves tomuscle contractionsmooth muscleSensory neurons inthe digestive systemprovide feedbackDepolarizationSmoothand opening ofCaz+ channels,musclecellsproduction ofaction potentialsParasympatheticNeural input to ICCand smooth muscleneurons "twe ak" theAutonomicenaxonrhythmhes paag syrpiner

Question
Asked Oct 17, 2019
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Could you explain the enteric nervous system of the digestive system, these points in detail? 

  • specialised cells called pacemakers generates rhythmic contractions by stimulating smooth muscle contraction.
  • sensory neurons in digestive system provide feedback.
  • parasympathetic neuron "tweak" the rhythm.

 

The Enteric Nervous System
Copyright
McGraw-Hill Education. Permission required for reproduction or display.
Specialized cells
called pacemakers
generate rhythmic
contractions by
stimulating smooth
Structures
Functions
Production
Interstitial
cells of
of slow waves
enter
Cajal
Conduction of
slow waves to
muscle contraction
smooth muscle
Sensory neurons in
the digestive system
provide feedback
Depolarization
Smooth
and opening of
Caz+ channels,
muscle
cells
production of
action potentials
Parasympathetic
Neural input to ICC
and smooth muscle
neurons "twe ak" the
Autonomic
en
axon
rhythm
hes paag syrpiner
help_outline

Image Transcriptionclose

The Enteric Nervous System Copyright McGraw-Hill Education. Permission required for reproduction or display. Specialized cells called pacemakers generate rhythmic contractions by stimulating smooth Structures Functions Production Interstitial cells of of slow waves enter Cajal Conduction of slow waves to muscle contraction smooth muscle Sensory neurons in the digestive system provide feedback Depolarization Smooth and opening of Caz+ channels, muscle cells production of action potentials Parasympathetic Neural input to ICC and smooth muscle neurons "twe ak" the Autonomic en axon rhythm hes paag syrpiner

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Expert Answer

Step 1

Pacemaker cells are myenteric interstitial cells of Cajal. These specialized cells undergo depolarisation and repolarisation to generate basal electrical rhythm (BER) or electrical control activity that stimulates smooth muscle of the stomach as well as small and large intestine. The electrical rhythm flows through gap junctions in the smooth muscles of the gastrointestinal tract. It is known as pacemaker cell as it is responsible for different contraction frequency in stomach, small intestine and large intestine. In stomach, the contraction frequency is 3 per minute. In small intestine, it is 12 per minute in duodenum while 9 per minute in ileum. In large intestine, this frequency slows down to once per 30 minutes.

Step 2

Sensory neurons in the digestive system provide feedback to the brain about the intake of food. Generally the vagal afferent feedback signals give the information of gastrointest...

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